1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Although they range from $150-$400 or more, a large capacity (25-70 pints) dehumidifier for a basement (the dampest portion of most homes) or other large area averages $200-$300.
2 Things You Need to Know to Choose the Right Dehumidifier. Dehumidifiers have become an essential appliance for homes and offices. In addition to keeping you comfortable, a dehumidifier can also prevent serious damage to your home that can be caused by excessive humidity in the air.